+ memcg-remove-__mod_lruvec_kmem_state.patch added to mm-new branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: memcg: remove __mod_lruvec_kmem_state
has been added to the -mm mm-new branch.  Its filename is
     memcg-remove-__mod_lruvec_kmem_state.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/memcg-remove-__mod_lruvec_kmem_state.patch

This patch will later appear in the mm-new branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
notice and to finish up reviews.  Please do not hesitate to respond to
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fixup patches in mm-new.

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------------------------------------------------------
From: Shakeel Butt <shakeel.butt@linux.dev>
Subject: memcg: remove __mod_lruvec_kmem_state
Date: Mon, 10 Nov 2025 15:20:06 -0800

__mod_lruvec_kmem_state() is already safe against irqs, so there is no
need to have a separate interface (i.e.  mod_lruvec_kmem_state) which
wraps calls to it with irq disabling and reenabling.  Let's rename
__mod_lruvec_kmem_state() to mod_lruvec_kmem_state().

Link: https://lkml.kernel.org/r/20251110232008.1352063-3-shakeel.butt@linux.dev
Signed-off-by: Shakeel Butt <shakeel.butt@linux.dev>
Reviewed-by: Harry Yoo <harry.yoo@oracle.com>
Reviewed-by: Qi Zheng <zhengqi.arch@bytedance.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/memcontrol.h |   28 +++++-----------------------
 mm/memcontrol.c            |    2 +-
 mm/workingset.c            |    2 +-
 3 files changed, 7 insertions(+), 25 deletions(-)

--- a/include/linux/memcontrol.h~memcg-remove-__mod_lruvec_kmem_state
+++ a/include/linux/memcontrol.h
@@ -957,17 +957,7 @@ unsigned long lruvec_page_state_local(st
 void mem_cgroup_flush_stats(struct mem_cgroup *memcg);
 void mem_cgroup_flush_stats_ratelimited(struct mem_cgroup *memcg);
 
-void __mod_lruvec_kmem_state(void *p, enum node_stat_item idx, int val);
-
-static inline void mod_lruvec_kmem_state(void *p, enum node_stat_item idx,
-					 int val)
-{
-	unsigned long flags;
-
-	local_irq_save(flags);
-	__mod_lruvec_kmem_state(p, idx, val);
-	local_irq_restore(flags);
-}
+void mod_lruvec_kmem_state(void *p, enum node_stat_item idx, int val);
 
 void count_memcg_events(struct mem_cgroup *memcg, enum vm_event_item idx,
 			unsigned long count);
@@ -1403,14 +1393,6 @@ static inline void mem_cgroup_flush_stat
 {
 }
 
-static inline void __mod_lruvec_kmem_state(void *p, enum node_stat_item idx,
-					   int val)
-{
-	struct page *page = virt_to_head_page(p);
-
-	mod_node_page_state(page_pgdat(page), idx, val);
-}
-
 static inline void mod_lruvec_kmem_state(void *p, enum node_stat_item idx,
 					 int val)
 {
@@ -1470,14 +1452,14 @@ struct slabobj_ext {
 #endif
 } __aligned(8);
 
-static inline void __inc_lruvec_kmem_state(void *p, enum node_stat_item idx)
+static inline void inc_lruvec_kmem_state(void *p, enum node_stat_item idx)
 {
-	__mod_lruvec_kmem_state(p, idx, 1);
+	mod_lruvec_kmem_state(p, idx, 1);
 }
 
-static inline void __dec_lruvec_kmem_state(void *p, enum node_stat_item idx)
+static inline void dec_lruvec_kmem_state(void *p, enum node_stat_item idx)
 {
-	__mod_lruvec_kmem_state(p, idx, -1);
+	mod_lruvec_kmem_state(p, idx, -1);
 }
 
 static inline struct lruvec *parent_lruvec(struct lruvec *lruvec)
--- a/mm/memcontrol.c~memcg-remove-__mod_lruvec_kmem_state
+++ a/mm/memcontrol.c
@@ -799,7 +799,7 @@ void __lruvec_stat_mod_folio(struct foli
 }
 EXPORT_SYMBOL(__lruvec_stat_mod_folio);
 
-void __mod_lruvec_kmem_state(void *p, enum node_stat_item idx, int val)
+void mod_lruvec_kmem_state(void *p, enum node_stat_item idx, int val)
 {
 	pg_data_t *pgdat = page_pgdat(virt_to_page(p));
 	struct mem_cgroup *memcg;
--- a/mm/workingset.c~memcg-remove-__mod_lruvec_kmem_state
+++ a/mm/workingset.c
@@ -749,7 +749,7 @@ static enum lru_status shadow_lru_isolat
 	if (WARN_ON_ONCE(node->count != node->nr_values))
 		goto out_invalid;
 	xa_delete_node(node, workingset_update_node);
-	__inc_lruvec_kmem_state(node, WORKINGSET_NODERECLAIM);
+	inc_lruvec_kmem_state(node, WORKINGSET_NODERECLAIM);
 
 out_invalid:
 	xa_unlock_irq(&mapping->i_pages);
_

Patches currently in -mm which might be from shakeel.butt@linux.dev are

mm-memcg-dump-memcg-protection-info-on-oom-or-alloc-failures.patch
memcg-use-mod_node_page_state-to-update-stats.patch
memcg-remove-__mod_lruvec_kmem_state.patch
memcg-remove-__mod_lruvec_state.patch
memcg-remove-__lruvec_stat_mod_folio.patch